If A is an invertible matrix of order 2

MATHEMATICS · Single correct · CBSE · Mathematics · Determinants · Determinants

Problem

18. If A is an invertible matrix of order 2 , then det⁡(A−1)\operatorname{det}\left(\mathrm{A}^{-1}\right) is equal to (A) det⁡(A)\operatorname{det}(\mathrm{A}) (B) 1det⁡( A)\frac{1}{\operatorname{det}(\mathrm{~A})} (C) 1 (D) 0

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